Home / 443,856.11-665,789.03-128,315.75

Finding the Fourth Proportional to 443,856.11, 665,789.03 and 128,315.75

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Solution

The fourth proportional to 443,856.11, 665,789.03 and 128,315.75 is: 192,475.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,856.11 : 665,789.03 = 128,315.75 : x
  2. Step 2: Convert to fraction form
    443,856.11/665,789.03 = 128,315.75/x
  3. Step 3: Cross multiply
    443,856.11x = 665,789.03 × 128,315.75
  4. Step 4: Simplify right side
    443,856.11x = 85,431,218,726.22
  5. Step 5: Solve for x
    x = 85,431,218,726.22/443,856.11
  6. Step 6: Final answer
    x = 192,475.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.